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(meteorobs) IT IS INTERESTING!


Hello,
The last year in Meteorobs the subject of possible occurrence noticeable
meteoric shower, bound with a comet 73P/Schwassmann-Wachmann 3 was
considered.
The considered, that with this comet is bound feeble meteoric shower Tau
Herculid, usually observable in the beginning of June. However, after 1930,
when this comet was detected, its orbit has experienced some perturbacion
and now, probably, there is one more feeble meteoric stream, which the Earth
transit in the second half of May. The visual observations which have been
carried out in the last year in Japan, seem, confirm it.
In 1995, during the previous returning to the Sun 73P/Schwassmann-Wachmann 3
has undergone some flashouts and fragmented, with than the probable raise of
activity meteoric shower can be bound. At the end of January 2001,
73P/Schwassmann-Wachmann 3 again has returned to a perihelion and the
observations bound with it meteoric showers can appear intriguing. The
probability of noticeable meteoric manifestation is not eliminated, though,
it is necessary to remark, that for more sure prognosis the more detailed
calculations are required.
For the interested observers it is possible to add, that during 20 years the
orbit 73P/Schwassmann-Wachmann 3 approaches to an orbit of the Earth almost
on a tangent and there is close long time. As the meteoric particles not
necessarily move strictly on an orbit of a parent comet, the observations
are important during all indicated below interval of time:

Date (2001)  Solar longitude DR (AU)  RADIANT   Vg (km/sec)*
                                                              RA  Decl
May 15.1        54.3              0.054        209   +21        14
May 22.3        61.2              0.042        211   +25        13
May 31.3        69.9              0.054        209   +29        12
Maximum the Earth will come nearer to an orbit of a comet, in 134.7 days,
after a comet.
* The program, on which the velocity of entrance of hypothetical meteoric
particles in an atmosphere of our planet was calculated (Vg), does not take
into account an attraction of the Earth.

Sergey Shanov
RUSSIA

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